Surface combustion on a ceramics-coated foamed-metal matrix
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The results of a comparative study of the characteristics of surface combustion in the infrared mode on a flat and volumetric foamed-metal matrix with a ceramic (alumina) coating are reported. The coating of thickness ~200 μm was applied by using the detonation method. It was shown that the covering of the matrix with a material having a lower emissivity and thermal diffusivity causes the flame front to immerse into the matrix and increases the surface layer temperature. For combustion on a flat matrix at a firing rate of ~75 W/cm2, the concentrations of nitrogen oxides and carbon monoxide were up to two times lower. For combustion in a volumetric matrix at a firing rate of ~30 W/cm2, the reduction in the concentration of nitrogen oxides was two to three times lower.
Keywordssurface combustion radiant burners combustion limits
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